Nonlinear coupling in the NOx-SOx reactive organic system
1988; Elsevier BV; Volume: 22; Issue: 11 Linguagem: Inglês
10.1016/0004-6981(88)90479-9
ISSN1878-2442
AutoresWilliam R. Stockwell, Jana B. Milford, Gregory J. McRae, Paulette Middleton, Julius S. Chang,
Tópico(s)Atmospheric and Environmental Gas Dynamics
ResumoA major scientific issue in debates about alternative proposals for reducing acid deposition over North America is whether there is a linear relationship between SO2 emissions and sulfate deposition. The atmospheric SO2 oxidation rate is one factor which determines deposition patterns. A key finding of this work is that future increases in ambient concentrations of nitrogen oxides and volatile organic compounds resulting from increased emissions can be expected to have a significant impact on gas-phase sulfate production rates. In particular, control strategies designed to lower regional O3 concentrations could increase sulfate production rates. The gas-phase chemistry model predicts that for fixed initial concentrations of NOx and VOC, lowering the initial SO2 concentration always reduced by a nearly proportional amount the gas-phase SO2−4 produced during daylight hours. If aqueous-phase chemistry is considered, the potential acid production rate becomes a strong function of the anthropogenic organic emission rate. Thus, acid production and oxidant formation are closely coupled.
Referência(s)